feat: add asdf-plugin-manager plugin

[aabouzaid]

Summary

Hi 👋

I'd like to add asdf-plugin-managerl to this repository.

Description:

• Tool repo URL: https://github.com/asdf-community/asdf-plugin-manager
• Plugin repo URL: https://github.com/asdf-community/asdf-plugin-manager

Checklist

• Format with scripts/format.bash
• Test locally with scripts/test_plugin.bash --file plugins/asdf-plugin-manager
• Your plugin CI tests are green
  • Tip: use the plugin_test action from asdf-actions in your plugin CI

[jthegedus]

I am going to merge this but want to be very clear that this plugin does not address any of the underlying design issues with the core or concerns of maintainers about how to properly solve this problem. So as a notice, a solution in the core may conflict with this and break peoples systems in future.

[aabouzaid]

@jthegedus Yeah, that's a layer to fix the issue externally. If asdf provided a built-in solution, then asdf-plugin-manager would be obsolete, and there would be no need for it anyway.

[jthegedus]

Given the volume of people wanting this feature I imagine you will see a decent amount of adoption. So if/when it becomes obsolete it will cause a decent amount of tech debt. A migration script would probably be needed to help those migrate. Looking at your profile, you seem very familiar with open source and the dangers of committing to supporting software publicly 💯 Appreciate the work 👏